5 of us:
Husband: 2012 13" MBA, iPad 2, iPhone 5s
Myself: 2012 13" MBA, iPad 3, iPhone 5s
Son: 2012 Mac Mini, iPhone 5, iPad 4, Apple TV (he's in med school which required him to purchase Thinkpad for laptop against his wishes)
Daughter 1: 2012 11" MBA, iPhone 5 (college)
Daughter 2: 2011 13" MBP, iPhone 4s
Household: Apple TV's (3), Time Capsule, Airport Express
And we bought iPad 2's in 2012 for all three grandparents and they all use iPhones. So yeah, we're inextricably tied into Apple system whether we like it or not. I do have a 2013 Nexus 7 I bought on release in August just so I can say I use Android as well.
I will soon own a new iPad Air and continue the hand-me-down system. My husband uses iPad for only maybe an hour at best, never travels with it, so he doesn't care about having the latest and greatest model. He prefers his MBA whilst I use my MBA primarily for productivity and use my iPad as my main computing device. I forgot to even list all the aging iPods which was where it all started many years ago! That and my first MacBook in 2001.